Interior-conduit capping.



No. 672,589. Patented Apr; 23, MN.

W. F. BOSSERT..

INTERIOR CONDUIT CAPPING.

(N M d I w (Application flied Feb. 13, 19m.)

WITNESSES: INVENTOR.

.4 TTORNEY;

ma NORVHS PETENS to FHOTQ-ILITNO,WASHYNGYON, u. c

UNITED STATES PATENT OFFICE.

WILLIAM F. BOSSERT, OF UTICA, NE\V YORK, ASSIGNOR TO THE BOSSERTELECTRIC CONSTRUCTION COMPANY, OF SAME PLACE.

lNTERlOR-CONDUIT CAPPING.

SPECIFICATION forming part of Letters Patent No. 672,589, dated April23, 1901.

I Application filed February 13, 1901. Serial No. 47,118. (No model.)

To ctZZ whmn it may concern:

Be it known that 1, WILLIAM F. Bossnnr, residing at Utica, in the countyof Oneida and State of New York, have invented certain Improvements inInterior-Conduit Cappi ngs, of

which the following is a specification.

The present invention relates to the interior conduit systems with whichmodern buildingsarenowcoinmonlyequipped. Such 1o conduits, consisting ofiron pipes, are located in the partitions and floors of the building andare brought to central points in the walls thereof, Where junction-boxesare provided, to which the ends of the pipes terminate.

Previously these pipes ends extended into the boxes, and the conductorsthreaded into the same were brought out into the box. At the presenttime, however, the ends of the pipes are provided with cappings oroutletthimbles, by means of which the pipes are secured to the walls ofthe box, and the cappings are made with smooth orifice-surfaces, so thatthe conductors can be drawn over them without injuring the insulation.

2 5 My invention specifically relates to an improved form andconstruction of cappings by means of which the ends of the conduits aresecured to the walls of the junction-box, and the flanged end of thecapping is made as thin as possible, so that it will occupy very littlespace within the box- 2. great desideratum, as in many boxes in whichswitches are located all the space that can be obtained is required, itbeing necessary for many reasons to make the boxes as small and compactas may be.

I may construct the capping as an integral whole or in two parts orportions. When made in two portions, the main part consists of aninternally-threaded tube having a flange on one end, provided with a rimwhose edge is turned over to embrace the periphery of the second part,which consists of a disk provided with a central orifice having roundedsurfaces, the diameter of the orifice being less than the internaldiameter of the tube. The said first part may be made in the form of acasting or a forging or may be drawn into shape from a piece of ductilesheet metal,

and the second part may be made also as a casting, a forging, or drawnor spun up from ductile sheet metal, or it may consist of suitableinsulation.

When the capping is made as an integral whole, it is composed of metal,preferably of a ductile sheet, and drawn up into practically the sameoutline as just described of the twopart construction. The tubular partis internally threaded, and the flanged end is made thin and fiat, so asto project but little into the junction-box,and forms a shoulder againstthe inside wall of the said box and locks the conduit to the same.

Of the drawings forming a part of this specification, Figures 1 and 2are sectional and top views of the first part of the capping, and Figs.3 and 4 are sectional and top views of the second part of the capping,while Fig. 5 is a sectional view of the said two parts assembled andscrewed into the end of a conduit-pipe. Figs. 3, o, 6, 7, 8, and 9 aresectional views of modifications.

In Fig. 5, A represents the capping or outlet-cover, composed of theparts a and b. The partctconsists of a tubular portion 2, provided withan internal thread 8 and a flange 3 on one end, provided with the rim 4,and the part 5 consists of the disk 5, whose central portion has aperforation 7, the edges of which are rolled outward and inward to forma ring or annulus 6, whose lower curve is preferably on a level with theunder surface of the flat part 5. The part a may be cast or forged ormay be drawn up from sheet metal in the shape shown by Figs. 1 and 2 andthe internal thread 8 then cut in the tube 2, while the part b ispreferably made from sheet metal and spun up into shape, as shown inFigs. 3 and 4. The latter part is placed upon the flange 3 and the rim 4crimped down upon its edge 5, holding it firmly in place. The orifice 7is preferably of smaller diameter than the internal diameter of thetubular part 2, and when the capping A is screwed upon the end of aconduit-pipe c the inner or under 5 surface of the roll 6 forms anabutment for the end of the pipe. As constructed the flanged end 3 ofthe capping A projects very slightly into the interior of ajunction-box, a portion of the wall on of which is shown in Fig. 5, androo forms a shoulder against the inside of the wall 'm of the box andlocks the conduit to the same.

Figs. 3 and 6 are sectional views of modifications ofthe second part 1)shown in Figs. 3 and 6, respectively, in which the roll (3 is made solidinstead of hollow, as shown in the latter figures.

Fig. 6 is a modification in which the roll 6 does not have an inwardcurve, but is made straight and parallel with the tube 2, its endforming an abutment for the pipe end.

Fig. 7 is a modification in which the second part (1 of the capping isof insulating material, which may be formed from solid fiber or otherinsulation, which is inserted into the flange 3 and the rim crimped downupon its edge; or the rim may be turned over and the insulation be putin place while in a plastic condition. In either case the orifice 7 hasa rounded surface and its diameter is less than the internal diameter ofthe tube 2.

Figs. 8 and 9 show the capping A made in one piece of metal, the tube 2being threaded and the metal bending outward to form a shoulder 3 andthen returned toward the center and rounded inward, so that the innercurve is on a plane with the shoulder 3 and constitutes an abutment forthe end of the conduit 0. Then made as an integral whole,it ispreferably struck up from sheet metal, the diameter of the orifice beingsomewhat smaller that the diameter of the threaded tubular portion.

I claim as my invention- 1. A capping for interior conduits consistingof an interiorly-threaded tube with a thin fiat flanged end, havinganorifice or entrance to the interior of the tubular part roundedoutwardly and inwardly with a diameter less than that of the internaldiameter of the c0nduit, the shoulder of the flange adapted to lock theconduit to the wall of the box, as set forth.

2. A capping composed of two parts or portions, the first partconsisting of an internally-threaded tube having a flange on one endwhose edge is turned over to embrace the periphery of the second part,which consists of a disk provided with a central orifice haw ing roundedsurfaces. the diameter of the orifice being less than the internaldiameter of the tube, as set forth.

3. Acapping composed of two parts or portions, the first part consistingof an internally-threaded metal tube having a flange on one end whoseedge is turned over to embrace the periphery of the second part whichconsists of a metal disk provided with a central orifice havinginternally and externally rounded surfaces, the diameter of the orificebeing less than the internal diameter of the tube to form a shoulder, asset forth.

4. A capping composed of two parts or portions, the first partconsisting of an internallyt-hreaded metal tube having a flange struckup from a piece of sheet metal, the flange edge turned over to embracethe periphery of the second part, which consists of a metal diskprovided with a central orifice struck up from apiece of sheet metal,the orifice having interior and exterior rounded surfaces, the diameterof the orifice being less than the in ternal diameter of the tube, toform a shoul der, as set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 7th day of February, 1901.

WILLIAM F. BOSSERT.

Witnesses:

SAMUEL PETERS, FRED T. FOXENBERGER.

